A protection device is provided to protect connectors which are to be connected to electronic interfaces at a panel of a computer chassis (10). The protection device includes a bracket (30) secured to the panel, and a cover (50) pivotally attached to the bracket for shielding the connectors. The cover defines a plurality of slots for extension of cables of the connectors therethrough. The slots include a large assembly slot (59), a narrow accommodating slot (58), and a connecting slot communicating the assembly slot and the accommodating slot. The accommodating slot is in alignment with a zone disposed at the panel of the computer chassis having at least one electronic interface for collecting a cable of at least one connector, the assembly slot allowing entrance of the at least one connector is not in alignment with the zone.